Assertion :
Killer strain of Paramecium aurelia can kill sensitive strain.
Reason: If sensitive strain is provided kappa particle, it becomes killer.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Paramecium aurelia has two strains killer and sensitive. The killer strain is able to kill the sensitive strain protist by means of chemical paramecin, secreted by minute cytoplasmic particles called kappa particle. The sensitive strain protists do not have kappa particles. The sensitive strain can also become killer if it receive sufficient kappa particles. So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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